The effect of sliding friction in the problem of what happens when a tablecloth is pulled from under dishes is considered. Theoretical considerations and possible dish displacements are discussed. (CW)

Examined were children's conception of changes in the state of matter and their understanding of the reversibility of the process. The relationship between children's intuitive ideas about matter, as observed in this study, and their logical ability to conserve weight is discussed. (CW)

Discussed are the motivations of geology teachers, a definition of teaching, and the meaning of geology. Stresses that teaching is a matter of providing opportunities for learning. (CW)

Reports on a survey which was undertaken to provide an overview of the biology content of a selection of General Certificate of Secondary Education science syllabuses. Lists syllabuses examined and the four themes in terms of which they were analyzed. Concludes that each contained a substantial biology component. (RT)

Reports on some potential teaching problems associated with children's scientific ideas about the concept of mutation. Provides information on the sample, methodology of study, and analysis. Concludes that in biology teaching the treatment of the concept must ensure that its genetic sense is specifically delineated. (RT)

Describes a class activity, a game called "Beware--Radiation," developed as a framework for the introduction of the topic of radiation. Reports that both students and teachers had similar and mostly wrong preconceptions. (Author/YP)

Discusses some issues that have long been claimed as the exclusive province of the humanities, such as brotherhood and belonging, the sense of beauty, and the meaning of human. Suggests how a knowledge of science can contribute to understanding. (YP)

Analyzes a "Time" article discussing genetics and bioethics to evoke the need of scientific literacy education. Suggests reform in teacher education programs. (YP)

Discusses some calculations and demonstrations illustrating the role of physics in cardiovascular system. Describes a model for the system, work done by the heart, pressure in blood vessel, and gravitational effects. (YP)

Describes how to make and use an inexpensive video disc of physics demonstrations. Discusses the background, production of the disc, subject of the disc including angular momentum, "monkey and the hunter" experiment, Doppler shift, pressure of a constant volume of gas thermometer, and wave effects, and using the disc in classroom. (YP)

Discusses how a spreadsheet might be used in an introductory physics laboratory. Describes three categories of spreadsheet uses, advantages of spreadsheet, layout, accuracy, and modifications. Gives an example of the variable mass rocket problem with typical display. (YP)

Examines the educational value of exhibits for transferring wildlife information to high school students. Reports that the passive exhibitry technique produced increases in the wildlife knowledge of students. (Author/YP)

Illustrated is the confusion over centrifugal force in sample problems, diagrams, formulas, and examples. Some recommendations to remedy the situation are suggested. (YP)

Demonstrates the inverted image, the chromatic aberration, and the floaters of the eye using an opaque 35mm film container with a small pinhole poked through the bottom. Describes the observation of Haidinger's brushes using polarized light. (YP)

Discusses a demonstration of interference phenomena using three sheets of polaroid material, a light source, and a light meter. Describes instructional procedures with mathematical expressions and a diagram. (YP)